Ques 40-II-D-13

40. Which of the following statements are true ?
I.   A circuit that adds two bits, producing a sum bit and a carry bit is called half adder.
II.  A circuit that adds two bits, producing a sum bit and a carry bit is called full adder.
III. A circuit that adds two bits and a carry bit producing a sum bit and a carry bit is called full adder.
IV.  A device that accepts the value of a Boolean variable as input and produces its complement is called an inverter.
(A) I & II    
(B) II & III
(C) I,II,III    
(D) I,III & IV

ANS-(D)